#588DBB
Closest named color: Faded Blue (#658CBB). oklch(62.5% 0.09 246.1), rgb(88, 141, 187).
Aa
Black text reads best on this color (5.94:1).
About this color
#588DBB is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.090 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.014 away. Black text reads best on it, at 5.94:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 5.94:1 |
| White text | 3.53:1 |
Values
| HEX | #588DBB |
| RGB | rgb(88, 141, 187) |
| HSL | hsl(208, 42%, 54%) |
| OKLCH | oklch(62.5% 0.09 246.1) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #588DBB | 3.53:1 | AA large text | Lc -68.3 | Content text, not long reading |
| Black text on #588DBB | 5.94:1 | AA | Lc 41.3 | Non-text elements, placeholder text |
| #588DBB text on white | 3.53:1 | AA large text | Lc 62.8 | Content text, not long reading |
| #588DBB text on black | 5.94:1 | AA | Lc -38.9 | Non-text elements, placeholder text |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 500.
-
Step 50
50
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF2
oklch(93.6% 0.013 244.3)
-
Step 200
200
#CDDBE9
oklch(88.5% 0.025 248.1)
-
Step 300
300
#AAC4DC
oklch(80.9% 0.044 246.2)
-
Step 400
400
#7CA5CA
oklch(70.6% 0.07 246.2)
-
Step 500
500 (this color)
#588DBB
oklch(62.5% 0.09 246.1)
-
Step 600
600
#3E78A9
oklch(55.5% 0.098 246.3)
-
Step 700
700
#306591
oklch(49.1% 0.091 246.1)
-
Step 800
800
#285376
oklch(42.8% 0.076 245.4)
-
Step 900
900
#26445F
oklch(37.6% 0.059 247.2)
-
Step 950
950
#172838
oklch(27% 0.038 247.9)
#588DBB with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #7A8EBD | 0.041 |
| Deuteranopia (no green cones) | #6D84BA | 0.032 |
| Tritanopia (no blue cones) | #1E989D | 0.076 |
| Achromatopsia (no color) | #888888 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #588DBB
#588DBB
oklch(62.5% 0.09 246.1)
- #AD7C4A
#AD7C4A
oklch(62.5% 0.09 65.4)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #588DBB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.014
- Dusty Blue #5A86AD ΔE 0.025
- Off Blue #5684AE ΔE 0.029
- Cool Blue #4984B8 ΔE 0.031
- Steel Blue #4682B4 ΔE 0.038
- Silver Lake Blue #778DA9 ΔE 0.043
- Blue Grey #758DA3 ΔE 0.047
- Blue NCS #118AB2 ΔE 0.051
Use #588DBB in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.